sum product algorithem for ldpc codes

LDPC encoder and the decoder of sum-product algorithm. (input H matrix form is Mackay s website form)

一种新型的建筑不规则低密度 奇偶检验基于所述修改（LDPC）码 渐进边增长（PEG）的算法。边缘 所述PEG算法的位置是由利用所述Sum-增强 积算法在奇偶校验矩阵的设计。该 提出的算法是在块长度和速度非常灵活。 被提议的方法构建代码的测试 AWGN信道和显著的性能改进 实现。建议解码器优化的灵活性 动作，然后由它的使用在修改所述改进的示 PEGIPEGI）算法来实现进一步的性能提升。-A novel construction for irregular

Low-Density Parity-Check (LDPC) codes have gained lots of popularity due to their capacity achieving/approaching property. This work studies the iterative decoding also known as message-passing algorithms applied to LDPC codes. Belief propagation